/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraNodeWithDynamicPins.h
Moves a pin among the pins of the same direction. Negative values for up, positive for down.
virtual void MoveDynamicPin ( [UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * Pin, int32 MoveAmount )